How to Eliminate Wrinkles in Battery Electrodes Coating

The coating process is often prone to appearance problems, such as dry cracking, streaking, color difference, bulging edge, wrinkling, etc. Among them, wrinkling occurs more frequently and requires high equipment and process parameters.

We need to pay attention to the follow process

Design phase

Predicting and solving coating wrinkle through accurate calculation and digital simulation

(1) The diameter, pitch and wrap angle of roller

(2) Electrodes speed, tension and deflection angle

(3) Temperature, flow direction and speed of air inside the oven, etc.

Manufacturing stage

(1) Smoothness of the roller surface

(2) Manufacturing precision of oven air nozzle;

(3) Roll fastening screws.

Installation stage

(1) The overall installation accuracy of the coating machine;

(2) Parallelism between rollers.

Commissioning stage

(1) Timely cleaning of foreign matter and water on the stick;

(2) Poor foil strip joint and unbalanced tension on both sides of the foil strip;

(3) The rubber roller surface of the pressure roller will undergo periodic elastic deformation in the course of use, when a certain degree of deformation remains, wrinkling will also occur, at which time the new product must be replaced.

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